Physics magnetism and curre
nt questions !

1. Which of the following is the unit of electrical resistance?
a) Ampere
b) Volt
c) Ohm
d) Coulomb

2. What is the relationship between current, voltage, and resistance?
a) Current is directly proportional to voltage and inversely proportional to resistance.
b) Current is inversely proportional to voltage and directly proportional to resistance.
c) Current is directly proportional to both voltage and resistance.
d) Current is inversely proportional to both voltage and resistance.

3. A wire carrying a current is placed in a magnetic field. What happens to the wire?
a) It experiences a force perpendicular to both the current and the magnetic field.
b) It experiences a force parallel to the current and the magnetic field.
c) It experiences a force in the direction of the magnetic field.
d) It experiences no force.

4. What is the name of the device used to measure electrical current?
a) Voltmeter b) Ammeter c) Galvanometer d) Ohmmeter

5. What is the direction of the magnetic field around a straight current-carrying wire?
a) Parallel to the wire b) Perpendicular to the wire c) Circular around the wire d) In the opposite direction of the current

6. What is the force experienced by a charged particle moving in a magnetic field?
a) Gravitational force b) Electric force c) Magnetic force d) Nuclear force

7. What is the principle behind an electric motor?
a) The interaction between magnetic fields and electric currents.
b) The conversion of electrical energy into mechanical energy.
c) The rotation of a coil in a magnetic field.
d) All of the above

8. What is the SI unit of magnetic flux density?
a) Tesla b) Weber c) Gauss d) Henry

9. What is the relationship between the magnetic field strength and the distance from a current-carrying wire?
a) Directly proportional b) Inversely proportional c) Not related d) Exponentially related

10. Which of the following is NOT a property of magnets?
a) They have two poles: north and south.
b) They attract all metals.
c) Like poles repel each other, while unlike poles attract each other.
d) They can create a magnetic field around them.

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